Sheave or pulley.



J. E. BORDENKIRCHER. SHEAVE 0R PULLEY.

APPLICATION PILED NOV. 27, 1908.

9 36, 2 1 3 Patented Oct. 5, 1909.

2 SHEETS-SHEET 1.

WITNESSES: LvVE/vm/e J- EQBordenkircher UNITED STATES PATENT OFFICE.

JOHN EDWARD BonnEnKIacHEn, or CUYAHOGA FALLS, 01110, ASSIGNOR or ONE-HALF '10 JACOB nsn'rz, or AKRON, 01110.

crank-pin openings.

snnsvn on PULLEY.

Specification of Letter; Patent.

Patented Oct. 5,1909.

Application filed November 27,1908. Serial 110.4%,523.

KIRGHER, a citizen of the United States, re

siding at Cuyahoga Falls, in the county of Summit and State-of Ohio, have invented certain new and useful Improvements in Sheaves or Pulleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in eccentric sheaves or pulleys, more particularly to the adaptation of such sheaves or pulleys for the reception of roller bearings, such sheaves or pulleys being used in connection with drilling machines.

Said invention has for its object to substitute for the crank member in that class of machines above referred to, an eccentric sheave'or wheel, whereby may be dispensed with parts. which have been found to be unnecessary for the work to be performed.

It also has for its object to reduce friction to the minimum, thereby promoting easy aulnning of the parts and strength and dura-.

i ity. I

Other objects and advantages will be here inafter referred to and more particularly pointed out in the claims.

In describing the invention in detail, reference will be had to the accompanying drawin'gs forming part of this specification, wherein like characters of reference designate corresponding parts in the several views, and -wherein Figures 1 and 2 are 0 posite side views of the sheave or pulley, Fig. 1 showing the practical application thereof. Fi 3 isa detached view of the'centralmem r hav' the eccentric axisreceiving opening an Fig. 4 is a detached view of the roller bearing retaining ring.

' Fig.5 is a section taken on the line. 7--7,

.s s, Fig. 2.

Fig". 2. Fig. Gis a sect ion taken on line In carrying out my invention, I form or contrive the pulley or sheave of a central member 1, a perimetric grooved member 2, a series of pins or rollers 3 and a ring or annular member 4. The central'member 1 has an eccentric openin 5-therethrough for the .reception of the driven shaft of a drilling machine of the character to which this pulley is particularly applicable, said central memberalso having a plurality or a number of the point of connection therebetween and the be found necessary in changing the stroke thereof, as will be readily understood from Fi 9.

l t will be noted that that port-ion of the central member 1 provided with the crankpin receiving openings 6, has its outer edge flush with the ring member 4 and is preferrenders the pulley or sheave lighter than would otherwise be the case, while the hub portion surrounding the shaft receiving opening 5 of said central member, projects a short distance beyond one face of said central member.

As indicated the central member 1 has projectiug from one side thereof, the usual shaft receiving hub 7 ,said member also being countersunk, as it were, upon the same side as at Sand terminating beyond the same with an annular flange 9.

The roller bearings or pins 3 are arranged around the central member 1' with one end of each of the same bearing against the flange 9, while the opposite ends thereof are confined by means of an annular ring 1 is provided with a' series of inwardly extendlng projections 11, from which said screw-threaded studsproject, said central member also havin an annular diametrically reduced extension 12 bearing said projections 11 and upon which extension fits the ring or annular member 4, as is clearly seen in Figsl 5 and 6,

The grooved perimetric member 2 is borne or earned by the roller bearings 3 in order to reduce friction to the minimum and it is designed to receive a belt preferably of the used in the class of machines herein referred to.

the foregoing construction of parts, a pulley or sheave is provided .to replace the ordinary the attachment of the crank-pin with the pulley or sheave may be varied for controlling the throw or stroke of the walking crank-pin receiving openings 6 for varying connecting rod of a walking beam, as may or member 4:, said ring being suitably held rope or hemp type (not shownlsuch as is I As has previously been noted, by means bf ably of skeleton-structural outline, which ring at its inner edge. The central member a crank used in drilling machines and whereby tral beam connecting rod and the sheave or wheel proper which receives the rope or hemp belt, is provided with a practically frictionless bearing.

I- claim: v

1. A sheave or pulley comprising a-central member having an eccentric axis-receivingopening and a series of crank-pin receiving openings arranged radially f with rela tion to said axis receiving opening, member also having an annular perimetric flange, a peripheral grooved member, a series or plurality of rollers and an additional annular ring member, said central member also having a diametrically reduced extension upon which fits said additional annular member having inwardly extending projec- 'tions provided with screw threaded studs,

said studs being equipped with nuts engaging said additional annular member, said rollers being received between said grooved peripheral member, said annular flange and said additional annular member.

2. A pulley or sheavecomprising a cenmember having a rib or skeleton-like extension and also an axis-receiving opening and a series of crank-pin receiving openings said central extending through said skeleton like extension and terminating-flush with, one face thereof, the opposite face of said central member being counter-sunk or recessed and having an annular perimetric flange, also a hub extending around said axis-receiving opening projecting slightly beyond the face of said central member, a grooved perimetric 35 member encompassing said central member,

a plurality of rollers-interposed between said grooved member and 

